<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>新增商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert title="添加商品信息" center show-icon type="info" :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :active="stepActive * 1" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 标签栏 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="stepActive"
          :before-leave="changeTagsPage"
          @tab-click="tabClickEvent"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 级联 -->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cascaderprops"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="item1"
                  v-for="(item1, index) in item.attr_vals"
                  :key="index"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="uploadImgHeaders"
              :on-success="uploadImgSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="addShopBtn">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="proviewImg" alt class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data () {
    return {
      stepActive: '0',
      // 添加商品表单
      addForm: {
        goods_name: '',
        goods_price: null,
        goods_weight: null,
        goods_number: null,
        goods_cat: [],
        // 图片数组
        pics: [],
        // 商品描述
        goods_introduce: '',
        attrs: []
      },
      // 添加商品表单规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [{ required: true, message: '请选择商品分类' }]
      },
      cateList: [],
      cascaderprops: {
        expandTrigger: 'hover',
        checkStrictly: false,
        value: 'cat_id',
        label: 'cat_name'
      },
      // 动态参数列表
      manyTableData: [],
      // 静态参数列表
      onlyTableData: [],
      // 图片请求头
      uploadImgHeaders: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片的地址
      proviewImg: '',
      // 预览图片的开关
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取商品分类
    async getCateList () {
      const res = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)

      this.cateList = res.data
    },
    handleChange () {
      if (this.addForm.goods_cat.length < 3) this.addForm.goods_cat = []
      this.getCateList()
    },
    changeTagsPage (activeName, oldActiveName) {
      if (oldActiveName === '0') {
        // 在第一个标签页的时候
        if (this.addForm.goods_cat.length !== 3) {
          this.$message.error('请选择商品的分类')
          return false
        } else if (this.addForm.goods_name.trim() === '') {
          this.$message.error('请输入商品名称')
          return false
        } else if (this.addForm.goods_price.trim() === '0') {
          this.$message.error('请输入商品价格')
          return false
        } else if (this.addForm.goods_weight.trim() === '0') {
          this.$message.error('请输入商品重量')
          return false
        } else if (this.addForm.goods_number.trim() === '0') {
          this.$message.error('请输入商品数量')
          return false
        }
      }
    },
    // 切换tabs
    async tabClickEvent () {
      console.log(this.stepActive)
      if (this.stepActive === '1') {
        // 获取动态参数
        const res = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } }
        )
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)

        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        })
        this.manyTableData = res.data
      } else if (this.stepActive === '2') {
        const res = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        )
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览
    handlePreview (file) {
      this.proviewImg = file.response.data.url
      this.previewVisible = true
    },
    // 移除图片
    handleRemove (file) {
      const index = this.addForm.pics.indexOf({
        pic: file.response.data.tmp_path
      })
      this.addForm.pics.splice(index, 1)
    },
    // 图片上传成功
    uploadImgSuccess (response, file, fileList) {
      this.addForm.pics.push({ pic: response.data.tmp_path })
    },
    // 添加商品
    addShopBtn () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的信息')
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // console.log(form)
        const res = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error(res.meta.msg)
        this.$message.success(res.meta.msg)
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 20px 0;
}
/deep/ .el-step__title {
  font-size: 12px;
}
.el-cascader {
  width: 100%;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
/deep/.ql-editor {
  min-height: 300px;
}
.btnAdd {
  margin-top: 20px;
}
</style>
